> In the end, people are not willing to give out disk space for free, therefore Filecoin will exist.
Disk space is one parameter of the equation though. Bandwidth and uptime should be considered too in order to estimate the effective amount of resources a node adds to the network.
Given enough peers over time, neither bandwidth or uptime should be an issue. If an incentive based system like Filecoin were to take off, and there's a market to exchange that currency, then it may actually be a viable business just to set up farms that host content. Kind of like a hosting service, but with indirect customers.
Disk space is one parameter of the equation though. Bandwidth and uptime should be considered too in order to estimate the effective amount of resources a node adds to the network.